Tuners in T for antenne filaire

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Tuners in T for antenne filaire

Tuners in T for antenne filaire

This is a high-pass T-filter consisting of a variable inductance inductor and two CVs. Each of these 2x125pF CVs has a capacity of 250 pF

post 05 Dec 2024

PIC-Keyer

PIC-Keyer This project describes the construction of a real "QRP" keyer with a small microcontroller PIC 16F84, with slightly modified hardware also PIC16F62

RF Inductance Calculator

RF Inductance Calculator Mean diameter of the air core coil, measured from conductor centre to conductor centre include the wire insulation thickness, if any

Voice Recorder

Voice Recorder Gestito dall'integrato in questione ed offre la possibilità di registrare più messaggi per una durata massima di un minuto con buona fedeltà di riproduzione

20 meters Cage Dipole I badly needed an antenna for 20 meters. It was when the Cage Antenna solution came to my mind

Antenna Half Sloper Multiband 1.8, 3.5, 7, 14, 21, 28 MHz I made about 25,000 QSOs on it mainly in international contests - in 1.8, 3.5, 7, 14, 21, 28 MHz bands. The antenna also works effectively in WARC bands

160M 1/4 Wave Vertical 160m vertical antenna project. It is 100' of Rohn 25G and a 20' aluminum stinger. The base is made out of four 6' power line insulators sandwiched between two Rohn base plates. 7/8' stainless bolts hold the assembly together. 32 radials 50' long and 30 radials 100'

DHD Double Half Delta This is a dhd double half delta in theory it should return a low signal but with a good s - n ratio roughly like a beverage

Visual CW Tuning Indicator Many transceivers set the CW transmit off-set equal to the set's sidetone frequency. But it was left to the operator how to match incoming signals to the sidetone for one-frequency QSOs an awkward and time-consuming procedure

Convert ADIF to Cabrillo Format

Convert ADIF to Cabrillo Format Have an ADIF file from amateur radio contesting, but the contest you want to enter wants a Cabrillo-formatted file? This is the tool that you need

40m center loaded vertical antenna

40m center loaded vertical antenna Vertical of 5 meters with central traps for 40m

Diy Arduino CW keyer

Diy Arduino CW keyer I added code to read push-buttons on digital pins to trigger hard-coded messages like CQ and CQ SOTA